Run git2::Repository::find_remote in the background (#44092)

We were seeing this hog the main thread.

Release Notes:

- N/A

---------

Co-authored-by: cameron <cameron.studdstreet@gmail.com>

crates/git_hosting_providers/src/git_hosting_providers.rs

@@ -33,11 +33,11 @@ pub fn init(cx: &mut App) {
 ///
 /// These require information from the Git repository to construct, so their
 /// registration is deferred until we have a Git repository initialized.
-pub fn register_additional_providers(
+pub async fn register_additional_providers(
     provider_registry: Arc<GitHostingProviderRegistry>,
     repository: Arc<dyn GitRepository>,
 ) {
-    let Some(origin_url) = repository.remote_url("origin") else {
+    let Some(origin_url) = repository.remote_url("origin").await else {
         return;
     };